It went all the way through the upgrade process. I did notice that it would not reinstall SP during the mod reinstall step. Then once I clicked the box to delete the upgrade.php and then clicked the link to my site the error appeared

It appears to have left many traces of SP. I installed the file it was asking for (since it was gone), then it asked for another, so I reinstalled it, now it's saying a block template it missing. So SP2 MUST be uninstalled prior to upgrade. I'll see how far I can get and report back.

grab a copy of your settings.php and settings_bak.php and place them in a rc1 directory. Remove the install.php and overwrite the forum directory. This should replace all files with fresh versions and remove all traces of the SP.

Please make sure to have current backups of the settings and settings_bak on your pc and in the directory you are uploading.

grab a copy of your settings.php and settings_bak.php and place them in a rc1 directory. Remove the install.php and overwrite the forum directory. This should replace all files with fresh versions and remove all traces of the SP.

Please make sure to have current backups of the settings and settings_bak on your pc and in the directory you are uploading.

I have run into the same problem...can you explain how to do this? Not sure i follow.